Photoinduced decomposition of dibenzoyldiethylgermane: A photochemical route to polygermanes

YÜKSEL DURMAZ Y., Kukut M., Monszner N., Yağcı Y.

Macromolecules, vol.42, no.8, pp.2899-2902, 2009 (SCI-Expanded) identifier

  • Publication Type: Article / Review
  • Volume: 42 Issue: 8
  • Publication Date: 2009
  • Doi Number: 10.1021/ma900253v
  • Journal Name: Macromolecules
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2899-2902
  • Istanbul Medipol University Affiliated: Yes

Abstract

A new and practical method for the preparation of polygermanes from dibenzoyldiethylgermane (DBDEG) under visible light irradiation was studied. The absorption at the visible range is attributed to the active n-π* transition which is well separated from the inactive n-π* transition. Optical absorption spectral changes of DBDEG recorded in CH3CN solutions before and after various periods of irradiation time is visible. Detailed investigations under different experimental conditions, at different wavelength and light intensity, revealed that photolysis of DBDEG in the absence of monomer causes scission and multiple coupling reactions forming polygermanes. The structure of the polymers was confirmed by 1H NMR analysis. It is clear that the process is highly efficient and the products also exhibit extremely high photoactivity and can be used as macrophotoinitiators for free radical polymerization.